US7061547B2 - Image displaying system of environment-adaptive type, image processing method and program - Google Patents
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- US7061547B2 US7061547B2 US10/031,441 US3144102A US7061547B2 US 7061547 B2 US7061547 B2 US 7061547B2 US 3144102 A US3144102 A US 3144102A US 7061547 B2 US7061547 B2 US 7061547B2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0606—Manual adjustment
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
Definitions
- the present invention relates to an environment-compliant image display system, image processing method and program.
- Such a conventional environment-compliant image processor is compliant with the environment, but not in consideration of use in the network environment.
- the same image data may provide images of different colors to the meeting rooms A and B, respectively.
- a presentation will be degraded if the color of an image displayed at a certain location is different from those of images displayed at other different locations.
- the present invention may provide an environment-compliant image display system, image processing method and program which can reproduce substantially the same color over different locations.
- the present invention relates to an environment-compliant image display system having a plurality of image display devices which are disposed at different locations and display substantially the same image when an object is displayed by the image display devices, each of the image display devices comprising:
- correction means which corrects input/output characteristic data for display used by display means in each of the image display devices to represent ideal image colors, based on visual environment information which indicates visual environment of an image display area.
- the present invention relates to an environment-compliant image processing method for representing substantially the same color at different locations, the method comprising the steps of:
- the present invention relates to a program embodied on an information storage medium or in a carrier wave for displaying substantially the same image at different locations, the program causing a computer to implement:
- input means which inputs visual environment information indicating visual environment of an image display area
- correction means which corrects input/output characteristic data for display used by display means to represent ideal image colors, based on the inputted visual environment information.
- the present invention relates to a computer-usable information storage medium comprising a program for implementing the above-described means.
- images can be displayed with substantially the same colors at different locations to represent ideal image colors.
- the present invention also relates to an environment-compliant image display system having a plurality of image display devices which are disposed at different locations and display substantially the same image when an object is displayed by the image display devices, one of the image display devices comprising:
- transmission means which transmits image information for representing an ideal image to the other of the image display devices through a transmission path
- correction means which corrects input/output characteristic data for display used by display means in each of the image display devices to represent ideal image colors, based on the image information and visual environment information which indicates visual environment of an image display area in a disposed location,
- reception means which receives the image information from the one of the image display devices through the transmission path
- Another correction means which corrects the input/output characteristic data for display used by the display means in each of the image display devices to represent ideal image colors, based on the received image information and the visual environment information which indicates the visual environment of an image display area in a disposed location.
- reception means which makes a reception device receive image data for display from a predetermined processing device
- images can be displayed with substantially the same colors at different locations to represent ideal image colors.
- an intended view of an image can accurately be reproduced at different locations by receiving the image information and displaying the image in real time, even if data of the original image is frequently updated.
- the present invention further relates to an environment-compliant image display system having a plurality of image display devices which are provided at different locations and display an image compliant with visual environment of a specific location in each of the different locations, each of the image display devices comprising:
- transmission means which transmits reference visual environment information of the specific location to the other image display devices disposed at locations different from the specific location through a transmission path, when the image display device is disposed at the specific location;
- reception means which receives the reference visual environment information through the transmission path, when image display device is disposed at a location different from the specific location;
- correction means which corrects input/output characteristic data for display used by display means in each of the image display devices to display an image compliant with the visual environment of the specific location, based on the received reference visual environment information and individual visual environment information of a disposed location when the image display device is disposed at a location different from the specific location.
- the present invention further relates to an environment-compliant image processing method for representing substantially the same colors as an image displayed at a reference location, the method comprising:
- reference image display step includes:
- the individual image display step includes:
- a correction step of correcting colors of an image based on the received reference visual environment and individual visual environment information indicating the grasped visual environment.
- the present invention also relates to a program embodied on an information storage medium or in a carrier wave, using a plurality of image display devices provided at different locations to display an image compliant with visual environment of a specific location at each of the different locations,
- transmission means which makes transmission means transmit reference visual environment information of the specific location to part of the image display devices disposed at locations different from the specific location through a transmission path, when the computer is disposed at the specific location;
- reception means receive the reference visual environment information through the transmission path, when the computer is disposed at a location different from the specific location;
- correction means which corrects input/output characteristic data for display used by display means in each of the image display devices to display an image compliant with the visual environment of the specific location, based on the received reference visual environment information and individual visual environment information of a disposed location of the computer when the computer is disposed at a location different from the specific location.
- the present invention also relates to a computer-usable information storage medium comprising a program for implementing the above-described means.
- the present invention further relates to an environment-compliant image display system having a plurality of image display devices which are provided at different locations and display an image compliant with visual environment of a specific location in each of the different locations, an image display device of the plurality of the image display devices disposed at a location different from the specific location comprising:
- reception means which receives reference visual environment information of the specific location transmitted from the specific location
- correction means which corrects input/output characteristic data for display used by display means in each of the image display devices to display an image compliant with the visual environment information of the specific location, based on the received reference visual environment information and individual visual environment information of a disposed location.
- the present invention further relates to a program embodied on an information storage medium or in a carrier wave, using a plurality of image display devices provided at different locations to display an image compliant with visual environment of a specific location at each of the different locations, the program causing a computer to implement;
- reception means receive reference visual environment information of the specific location transmitted from the specific location;
- correction means which corrects input/output characteristic data for display used by display means in each of the image display devices to display an image compliant with the visual environment information of the specific location, based on the received reference visual environment information and individual visual environment information of a disposed location of the image display device different from the specific location.
- the present invention further relates to a computer-usable information storage medium containing a program for implementing above-described means.
- an actual image view displayed at the reference location can be reproduced at the other locations, an intended view of an image can accurately be reproduced at the different locations.
- the image display system may further comprise grasp means which grasps the visual environment.
- the grasp means may measure at least one of color value, gamma and color temperature of a displayed image.
- At least one of color value, gamma and color temperature of a displayed image may be grasped in the grasp step of grasping the visual environment.
- the visual environment may be grasped by grasp means which measures at least one of the color value, gamma and color temperature of a displayed image.
- the visual environment can properly be grasped.
- the visual environment grasp means may be measuring means which measures the color value, gamma, color temperature and others of XYZ or RGB of the displayed image, for example.
- the gamma is a gradient in a photoelectric transfer characteristic curve at a certain point. Therefore, by grasping the gamma, the difference between the standard photoelectric transfer characteristic curve and the photoelectric transfer characteristic curve under the actual visual environment can be found. Thus, colors can be corrected based on the difference.
- the color temperature is the temperature at which a blackbody emits light of the same color as a given object.
- the color temperature almost depends on the display device. If an image display area of the display device receives an external light, however, the color temperature may be varied. Therefore, by grasping the color temperature in the actual visual environment, influence of the external light or the like can be grasped to properly correct colors.
- the color value may be XYZ value, RGB value or L*a*b* value (hereinafter simply referred to as “Lab”).
- the displayed image may be an image for presentation
- each of the image display devices may be a projector type of display device which projects an image for presentation.
- the correction step may include a step of correcting input/output characteristic data for display.
- gamma correction may be carried out as the correction of input/output characteristic data.
- FIG. 1 is a schematic diagram showing a network meeting system in which a laser pointer is used, according to one embodiment of the present invention.
- FIG. 2 is a schematic diagram showing a network meeting system for a plurality of meeting rooms.
- FIG. 3 is a functional block diagram of an image processing section of a conventional projector.
- FIG. 4 is a functional block diagram of an image processing section in a projector according to one embodiment of the present invention.
- FIG. 5 is a flowchart illustrating the entire presentation according to one embodiment of the present invention.
- FIG. 6 is a flowchart illustrating the preprocessing according to one embodiment of the present invention.
- FIG. 7 is a flowchart illustrating the calibration according to one embodiment of the present invention.
- FIG. 8 is a flowchart illustrating the presentation on the side of receiver according to one embodiment of the present invention.
- FIG. 9 is also a flowchart illustrating the calibration according to one embodiment of the present invention.
- FIG. 10 is a schematic diagram showing the concept of inverse vector in the Lab space.
- FIG. 11A is a graph showing the relationship between input and output in RGB input/output characteristic before gamma correction
- FIG. 11B is a graph showing the relationship between input and output in RGB input/output characteristic after gamma correction.
- FIG. 12 is a schematic diagram showing the concept of exterior division point in the Lab space.
- FIG. 13 is a schematic diagram showing RGB color triangles before and after correction.
- FIG. 14 is a schematic diagram showing a bus-connection type network meeting to which the present invention is applied.
- FIG. 15 is a schematic diagram showing an interconnection type network meeting to which the present invention is applied.
- FIG. 16 is a diagram showing hardware configuration of a projector according one embodiment of the present invention.
- FIG. 1 is a schematic diagram illustrating a network meeting system using a laser pointer 50 , which is constructed according to one embodiment of the present invention.
- a projector 20 is disposed substantially in front of a screen 10 and projects a predetermined presentation image onto the screen.
- a presenter 30 performs a presentation relative to meeting attendees while pointing a desired location in an image display area 12 on the screen 10 using a spot light 70 which is projected from the laser pointer 50 .
- the display of the image display area 12 is highly variable depending on the type of the screen 10 or the ambient light 80 .
- the same white color may differently be viewed to be yellowish white or to be bluish white, depending on the type of the screen 10 .
- the same white color may differently be viewed to be bright white or to be dark white, depending on the ambient light 80 .
- a presentation image may be displayed in a plurality of meeting rooms at the same time.
- FIG. 2 is a schematic diagram illustrating a network meeting system containing a plurality of meeting locations.
- an image based on an original image data is projected onto a dedicated screen 14 through a projector 20 - 1 in a visual environment in which the ambient light 82 is provided by a fluorescent light.
- the projector 201 - 1 in the meeting room 520 then transmits the original image data to another projector 20 - 2 in another meeting room 530 through a dedicated transmission path 54 .
- the projector 20 - 2 projects and displays an image based on the received original image data onto a screen 16 formed by a material different from that of the screen 14 in a visual environment in which the other different ambient light 84 is provided by both a fluorescent light and an external light.
- the display of the image may vary in the other meeting room 530 if the image is displayed as it is. This may hinder the communication between the meeting attendees or may not provide the desired presentation.
- FIG. 3 is a functional block diagram of an image processing unit in a projector according to the prior art.
- the prior art projector receives R 1 , G 1 and B 1 signals forming an analog RGB signal from PC or the like and inputs them into an A/D converter 110 .
- a projector image processing section 100 performs the color conversion of digital R 2 , G 2 and B 2 signals which have been converted by the A/D converter 110 .
- a D/A converter 180 converts R 3 , G 3 and B 3 signals subjected to the color conversion by the projector image processing section 100 into analog signals.
- An L/V (light valve) driver 190 drives a liquid crystal light valve to project and display an image, based on analog R 4 , G 4 and B 4 signals converted by the D/A converter 180 .
- the projector image processing section 100 is controlled by CPU 200 and comprises a projector color converting section 120 and a profile managing section 130 .
- the projector color converting section 120 converts the digital signals (R 2 , G 2 and B 2 ) from the A/D converter 110 into RGB digital signals (R 3 , G 3 and B 3 ) to be outputted from the projector, based on an input/output profile for the projector managed by the profile managing section 130 .
- the profile means the characteristic data.
- the prior art projector only performs the color conversion based on the input/output profile indicating the input/output characteristic inherent in the projector, but does not consider the visual environment in which the image is projected and displayed.
- the display of color is integrated without consideration of the visual environment.
- the display of color is determined by three factors, light, reflection or transmission of light on an object and visual sense.
- This embodiment of the invention implements an image display system which can reproduce the same color at different locations by grasping the visual environment reflecting the difference of the color display depending on a matter to which the display is to be performed such as the ambient light or screen material and transmitting the original image data as well as the information indicating the visual environment as reference to an image display device at any location whereat the image is to be displayed.
- More concrete techniques for realizing it include a technique of conforming the color of an image to be displayed at different locations to the ideal image color and another technique of conforming the color of an image to be displayed at different locations to the color of an image displayed at a reference location.
- a colored light sensor 60 functioning as visual environment grasping means is provided.
- the colored light sensor 60 inputs the visual environment information into a projector 20 . More particularly, the colored light sensor 60 measures XYZ values which are light reflection information in an image display area 12 on a screen 10 .
- the projector 20 comprises colored light information processing means for converting the visual environment information into coordinate values in a predetermined color space and also for determining coordinate values which form a complementary color pair for the converted coordinate values, based on coordinate values of a predetermined color in the predetermined color space in a predetermined reference environment as well as the converted coordinate values.
- the protector 20 also comprises correction means for correcting display input/output characteristic data used by means for displaying the image, based on the determined coordinate values being complementary color pair.
- the projector 20 further comprises means for receiving/transmitting the original image data and the reference visual environment information.
- the image processing unit of the projector 20 including the colored light information processing means and other means will now be described.
- FIG. 4 is a functional block diagram of the image processing unit in the projector 20 which is constructed according to one embodiment of the present invention.
- the projector 20 inputs RGB analog signals R 1 , G 1 and B 1 from PC or the like to the A/D converter 110 , and performs color conversion of digital signals R 2 , G 2 and B 2 by means of the projector image processing section 100 .
- the projector 20 inputs color-converted R 3 , G 3 and B 3 signals to a D/A converter 180 , and also inputs analog-converted R 4 , G 4 and B 4 signals to an L/V (light valve) driver 190 to drive the liquid crystal light valve for projecting and displaying an image.
- L/V light valve
- the projector 20 comprises a projector image processing section 100 which comprises a color signal converting section 160 , a color signal inverse converting section 170 , a color management section 150 , a projector color converting section 120 and a receiving/transmitting section 210 .
- the color signal converting section 160 converts RGB digital signals (R 2 , G 2 and B 2 ) from the A/D converter 110 into XYZ values (X 1 , Y 1 and Z 1 ).
- RGB signals are device dependence type colors which are variable depending on the input/output device such as projector 20 while XYZ values are device independence type colors which are invariable depending on the device.
- a concrete technique of converting RGB digital signals into XYZ values may be one that performs the matrix conversion using 3 ⁇ 3 matrix.
- the color signal converting section 160 outputs the converted XYZ values (X 1 , Y 1 and Z 1 ) toward the color management section 150 .
- the color management section 150 converts XYZ values (X 1 , Y 1 , Z 1 ) inputted from the color signal converting section 160 into XYZ values (X 2 , Y 2 , Z 2 ) which reflect the visual environment, based on measured values by the colored light sensor 60 as the visual environment grasp means.
- the color management section 150 comprises a colored light information processing section 140 and a profile managing portion 130 for managing the input/output profile for the projector 20 .
- the colored light information processing section 140 converts a white color reflecting the actual visual environment information into coordinate values in the Lab space and determines coordinate values that form a complementary color pair for the converted coordinate values, based on coordinate values in the white Lab space in a predetermined reference environment as well as the converted coordinate values.
- the complementary color pair means a pair of colors which creates a gray color when these colors are mixed together.
- the colored light information processing section 140 converts the XYZ values (X 1 , Y 1 and Z 1 ) inputted from the color signal converting section 160 into the other XYZ values (X 2 , Y 2 and Z 2 ) reflecting the visual environment, based on the measurements in the colored light sensor 60 .
- the profile managing portion 130 functions as the aforementioned correcting means and creates input/output profiles for the RGB signals in the projector 20 .
- the profile managing portion 130 further manages the RGB input/output characteristics for the projector 20 using the created input/output profiles for the RGB signals.
- the color signal inverse converting section 170 performs the matrix inverse conversion of the XYZ values (X 1 , Y 2 and Z 2 ) from the colored light information processing section 140 into RGB digital signals (R 5 , G 5 and B 5 ) using the aforementioned inverse matrix in the color signal converting section 160 .
- the projector color converting section 120 converts the RGB digital signals (R 5 , G 5 and B 5 ) from the color signal inverse converting section 170 into RGB digital signals (R 3 , G 3 and B 3 ) for projector output while referring the projector profile managed by the profile managing portion 130 .
- the projector image processing section 100 is controlled by CPU 200 and comprises a projector color converting section 120 and a profile managing portion 130 .
- the projector color converting section 120 converts RGB digital signals (R 6 , G 6 and B 6 ) from the A/D converter 110 into projector output RGB digital signals (R 3 , G 3 and B 3 ), based on the input/output profiles for the RGB signals managed by the profile managing portion 130 .
- the projector output RGB digital signals outputted from the projector color converting section 120 are then converted into RGB analog signals (R 4 , G 4 and B 4 ) by the D/A converter 180 .
- the L/V driver 190 then uses the RGB analog signals to drive the liquid crystal light valve for projecting and displaying the image.
- the projector 20 of this embodiment projects and displays the image taking the visual environment into consideration.
- the projector 20 can display an image accommodating to the environment on display by correcting the display input/output characteristic data used by the image display means based on the coordinate values reflecting the environment information and the coordinate values of complementary color pair.
- the projector 20 can absorb any difference in the display environment and display the same image without depending on the applied environment.
- This embodiment also considers the use of the projector 20 in the network.
- the projector 20 may include the receiving/transmitting section 210 .
- the receiving/transmitting section 210 When the projector 20 is disposed at the reference location and if the receiving/transmitting section 210 functions as receiving/transmitting means, the receiving/transmitting section 210 sends the image data (X 1 , Y 1 and Z 1 ) indicating the ideal image color to be displayed on calibration (or correction) toward the other projectors 20 . When the presentation is carried out, the receiving/transmitting section 210 also transmits a presentation image represented by RGB data (R 6 , G 6 and B 6 ) digital-converted by the A/D converter 110 toward the other projectors 20 .
- RGB data R 6 , G 6 and B 6
- the receiving/transmitting section 210 functions as receiver means for receiving the image data on calibration and also for receiving the transmitted RGB data (R 6 , G 6 and B 6 ) on presentation, from a receiving/transmitting section 210 in another projector 20 disposed at the reference environment location.
- the projector 20 disposed at a location different from the reference environment location corrects the image color so that it will coincide with the color of the ideal image data (X 1 , Y 1 and Z 1 ) by correcting the color space and input/output profiles based on the image data (X 1 , Y 1 and Z 1 ) received by the receiving/transmitting section 210 and XYZ values (X 3 , Y 3 and Z 3 ) measured by the colored light sensor 60 at that location.
- the projector 20 inputs the RGB data (R 6 , G 6 and B 6 ) received by the receiving/transmitting section 210 into the projector color converting section 120 for projecting and displaying the presentation image.
- substantially the same color can simultaneously be reproduced at different locations by regulating the image color so that it will coincide with the ideal color of the image data (X 1 , Y 1 and Z 1 ).
- FIG. 5 is a flowchart illustrating the entire presentation according to one embodiment of the present invention.
- the profile managing portion 130 performs the pre-processing such as preparation of the input/output profiles or the like (step S 2 ).
- the calibration (or correction) is then performed to do the regulation corresponding to visual environments by projecting white-color images from each of the projectors 20 to the corresponding screen 10 by a predetermined gradation unit depending on the visual environments of the respective locations (step S 4 ).
- step S 6 After calibration, a presentation is carried out (step S 6 ).
- step S 2 The procedures of the pre-processing (step S 2 ) to the presentation (step S 6 ) will sequentially be described in more detail.
- FIG. 6 is a flowchart illustrating the pre-processing according to one embodiment of the present invention.
- the A/D converter 110 first converts analog signals (R 1 , G 1 and B 1 ) of a reference white-color image for pre-processing into digital signals (R 2 , G 2 and B 2 ) (step S 12 ).
- the color signal converting section 160 then converts the digital signals into XYZ values (X 1 , Y 1 and Z 1 ) indicating the ideal color and outputs them toward the color management section 150 (step S 14 ).
- the projector 20 - 1 on the transmitter side transmits the white-color data (X 1 , Y 1 and Z 1 ) indicating the ideal color toward the projector 20 - 2 on the receiver side (step S 15 ).
- Both the projectors 20 - 1 and 20 - 2 respectively in the reference and non-reference environments perform a calibration, which will be described, so that values (X 3 , Y 3 and Z 3 ) measured by the respective colored light sensors 60 will be this white-color image data (X 1 , Y 1 and Z 1 ).
- the colored light information processing section 140 in the color management section 150 generates a color space (or Lab space) based on the XYZ values (X 1 , Y 1 and Z 1 ) (step S 16 ).
- the colored light information processing section 140 determines the coordinate values of the white-color image in the color space (step S 18 ).
- the colored light information processing section 140 further converts the XYZ values (X 1 , Y 1 and Z 1 ) into other XYZ values (X 2 , Y 2 and Z 2 ) reflecting the visual environment. At this step, however, the visual environment information is still not inputted. Therefore, the XYZ values (X 1 , Y 1 and Z 1 ) are equal to the XYZ values (X 2 , Y 2 and Z 2 ), respectively.
- the color signal inverse converting section 170 performs the inverse matrix conversion of the XYZ values (X 2 , Y 2 and Z 2 ) from the colored light information processing section 140 into digital RGB signals (R 5 , G 5 and B 5 ) using the inverse matrix in the aforementioned color signal converting section 160 (step S 20 ).
- the profile managing portion 130 creates the input/output profiles of the RGB signals in the projectors 20 based on the coordinate values of the white-color image generated by the colored light information processing section 140 (step S 22 ).
- the input/output profiles of the RGB signals corresponding to the respective projectors 20 disposed at various different locations will be prepared.
- the projector color converting section 120 converts the digital RGB signals (R 5 , G 5 and B 5 ) from the color signal inverse converting section 170 into digital RGB signals (R 3 , G 3 and B 3 ) which are to be outputted through the projectors, based on the prepared input/output profiles (step S 24 ).
- the D/A converter 180 converts the projector output digital RGB signals outputted from the projector color converting section 120 into analog RGB signals (R 4 , G 4 and B 4 ) (step S 26 ).
- the L/V driver 190 drives the liquid crystal light valve based on the analog RGB signals (step S 28 ) and projects and displays the white-color image (step S 30 ).
- step S 2 the projectors 20 disposed at the respective locations create the color spaces, the coordinate values in the respective color spaces under the reference environment and the input/output profiles of the RGB signals in the projectors 20 .
- step S 4 The calibration (step S 4 ) will now be described.
- FIG. 7 is a flowchart illustrating the calibration according to one embodiment of the present invention.
- a presenter 30 performs the calibration before the presentation image is actually displayed at different locations.
- step S 4 the projector 20 projects and displays the white-color image used in the pre-processing (step S 2 ) onto the corresponding screen 10 to grasp the visual environment in the image display area at a location whereat this projector 20 is disposed.
- the colored light sensor 60 measures the XYZ values (X 3 , Y 3 and Z 3 ) in the image display area 12 on which the white-color image is displayed (step S 32 ).
- the colored light information processing section 140 then computes and determines coordinate values within the color space (or Lab space) based on the measurements in the colored light sensor 60 (step S 36 ).
- the colored light information processing section 140 then computes and determines coordinate values of complementary color pair, based on the coordinate values at the reference environment determined at the step S 18 as well as the coordinate values in the actual visual environment (step S 38 ).
- the technique of determining the coordinate values of complementary color pair at this time may be one that determines is the inverse vector of a bound vector indicating the positions of the white-color coordinate values in the color space under the actual presentation environment, for example.
- FIG. 10 is a schematic diagram showing the concept of inverse vector in the Lab space.
- the Lab space includes a vertical axis representing the lightness L and a plurality of a*-b* planes along the L axis. It is now assumed that the coordinate values of the white-color values in the actual presentation environment were (a 1 *, b 1 *) in a predetermined a*-b* plane.
- the coordinate values (a 1 *, b 1 *) can be grasped as the origin in the a*-b* plane or a bound vector at a point whereat the a*-b* plane intersects the L axis.
- vector herein means one having a magnitude and an orientation.
- the white color is at a point on the L axis in the reference environment, but offset from the origin on the L axis by the coordinate values (a 1 *, b 1 *) in the actual environment.
- the profile managing portion 130 corrects the color by this inverse vector.
- the coordinate values of the white color measured in the actual environment will be on the L axis, such that the color of the actually displayed image will substantially coincide with the ideal XYZ values (X 1 , Y 1 and Z 1 ).
- the colored light information processing section 140 further outputs XYZ values (X 2 , Y 2 and Z 2 ) obtained by correcting the XYZ values (X 1 , Y 1 and Z 2 ), based on the coordinate values of complementary color pair.
- the color signal inverse converting section 170 matrix-inverse converts the XYZ values (X 2 , Y 2 and Z 2 ) from the colored light information processing section 140 into digital RGB signals (R 5 , G 5 and B 5 ) (step S 40 ).
- the profile managing portion 130 re-prepares the previously prepared input/output profiles of RGB signals, based on the coordinate values of complementary color pair (step S 42 ).
- the white-color image is displayed in each of the a*-b* planes existing on the L axis or by each of predetermined gradations, the displayed image being measured in XYZ values to correct the color.
- Each of the input/output profiles is actually used for gamma correction.
- FIG. 11A shows the relationship between the input and output in the RGB input/output characteristics before gamma correction. As shown in FIG. 11A , each of the RGB signals increases as the voltage (or input (V) value) increases and as the lightness (or output (cd/m 2 )) increases.
- FIG. 11A also shows the RGB input/output characteristic relating to the ideal light.
- each of the projectors 20 can use the colored light information from the colored light sensor 60 to obtain the ideal white color through the RGB input/output characteristic having no black spot (•) under the ideal environment which will not be influenced by the ambient light or screen material.
- the colored light information of the projector 20 is frequently influenced by the ambient light or screen material.
- the color is reproduced on the screen 10 while being strictly influenced by R and G if the projector 20 is not corrected relating to the white color.
- the input/output signals of R and G among the three input/output signals RGB maybe reduced, as shown by black spots. dependent on their corrected amount to correct the yellowish white color into the ideal white-colored light outputted from the projector 20 .
- FIG. 11B shows R and G curves re-prepared by shifting the black spots directly to the maximum axis (or dotted line in FIG. 11A ).
- R, G and B curves in the input/output signal characteristics after correction relating to RGB gradations in FIG. 10B are determined from the following formulas (1) to (3).
- Correction coefficients KR, KG and KB are determined from the following formulas (4) to (6)
- R signal (bit) KR ⁇ input signal before correction (1)
- G signal (bit) KG ⁇ input signal before correction (2)
- B signal (bit) KB ⁇ input signal before correction (3)
- KR maximum R input value after correction/255 (4)
- KG maximum G input value after correction/255 (5)
- KB maximum B input value after correction/255 (6)
- FIG. 13 is a schematic diagram showing RGB color triangle before and after correction.
- a point K (0, 0, 0) or a point whereat the lightness L axis passing through black intersects the color triangle rgb is at W (1, 1, 1) or white.
- the latter may be a color triangle r′g′b′.
- a point or white whereat the lightness L axis passing through black intersects the color triangle r′g′b′ is W′ (0.9, 0.9, 1) which is slightly nearer K (0, 0, 0) than the color triangle rgb.
- the calibration (step S 4 ) prepares the profiles in the actual applied environment to perform the gamma correction properly.
- each of the projectors 20 at different locations can reproduce the image color substantially coinciding with the ideal color (X 1 , Y 1 and Z 1 ).
- step S 6 The actual presentation (step S 6 ) after such a calibration will be described.
- FIG. 8 is a flowchart illustrating the presentation according to one embodiment of the present invention.
- the A/D converter 110 first converts analog signals (R 1 , G 1 and B 1 ) for the presentation image into digital signals (R 2 , G 2 and B 2 ) and digital signals (R 6 , G 6 and B 6 ).
- This presentation image data ((R 6 , G 6 and B 6 ) are transmitted from the projector 20 - 1 to the receiver side projector 20 - 2 (step S 62 ).
- the projector 20 - 1 inputs the presentation image data ((R 6 , G 6 and B 6 ) from the A/D converter 110 into the projector color converting section 120 while the projector 20 - 2 inputs the presentation image data ((R 6 , G 6 and B 6 ) received by the receiving/transmitting section 210 into the projector color converting section 120 .
- the projector color converting section 120 converts the RGB input/output profiles corrected on the calibration (step S 4 ) so that the same color can be reproduced into digital RGB signals (R 3 , G 3 and B 3 ) for the projector 20 (step S 64 ).
- the D/A converter 18 converts the projector output digital RGB signals outputted from the projector color converting section 120 into analog RGB signals (R 4 , G 4 and B 4 ) (step S 66 ).
- the L/V driver 190 drives the liquid crystal light valve based on the analog RGB signals (step S 68 ) and projects and displays the presentation image (step S 70 ).
- this embodiment corrects the input/output profiles reflecting the visual environments in the different locations to reproduce the ideal color.
- substantially the same image can be reproduced simultaneously at different locations without depending on the location whereat the projector 20 is disposed.
- the image processing can be carried out at increased speed by receiving/transmitting RGB data not required to be converted into the XYZ data.
- the projectors 20 may perform the presentation by receiving/transmitting the presentation data represented by the analog RGB signals or the presentation data represented by the XYZ type signals.
- the image information relating to the ideal image color may be transmitted by the processor such as PC or the like to the respective projectors 20 , rather than by the predetermined projector 20 - 1 .
- each of the different locations includes a projector 20 , a screen 10 , a colored light sensor 60 , a receiving/transmitting section 210 and PC.
- the basic processing technique is similar to the technique of correcting the input/output profiles or the like to provide the ideal color, but different from the last-mentioned technique in connection with the calibration.
- FIG. 9 is a flowchart illustrating the calibration according to one embodiment of the present invention.
- the white-color image may be received/transmitted on each calibration, but may previously be stored in the corresponding image display device since the white-color image is always invariable. It is assumed herein that the white-color image data used to display the white-color image has been previously stored in each of the projectors 20 .
- each of the projectors 20 projects and displays the white-color image based on the stored white-color image data (step S 72 ).
- the colored light sensor 60 connected to each of the projectors 20 measures the colored light (XYZ values) of the projected and displayed white-color image (step S 74 ).
- the receiving/transmitting section 210 connected to the projector 20 - 1 on the transmitter side sends the measured color information (XYZ values) including the measurements of the colored light sensor 60 toward the projector 20 - 2 on the receiver side (step S 76 ).
- the receiving/transmitting section 210 connected to the receiver side projector 20 - 2 receives the measured color information (XYZ values) (step S 78 ).
- the receiver side projector 20 - 2 corrects the input/output profiles and the like such that the measured color information (XYZ values) will coincide with the measured color information (XYZ values) received by the receiving/transmitting section 210 and reflecting the visual environment on the transmitter side (step S 80 ).
- the receiver side projector 20 - 2 judges whether or not the measured color information (XYZ values) measured by the colored light sensor 60 in the visual environment on the receiver side coincides with the measured color information (XYZ values) received by the receiving/transmitting section 210 and reflecting the transmitter side visual environment (step S 82 ). If not so, the display of the white-color image (step S 84 ), the measurement of the colored light (step S 86 ) and the correction of the input/output profiles and the like (step S 80 ) are repeated until the coincidence is attained.
- the measured color information (XYZ values) from the colored light sensor 60 that is, the actual color observed by the observer becomes the same color at different locations.
- the presentation image of the same color can simultaneously be viewed at both the receiver and transmitter sides by transmitting the presentation data from the transmitter side projector 20 - 1 to the receiver side projector 20 - 2 .
- This technique is superior to the first-mentioned technique of performing the correction to provide the aforementioned ideal color in respect to the high-speed processing, but the first-mentioned technique is superior in respect to the coincidence of the substantially completely reproduce color.
- FIG. 16 illustrates the hardware configuration of a projector 20 according to one embodiment of the present invention.
- the system shown in FIG. 16 comprises CPU 1000 , ROM 1002 , RAM 1004 , an information storage medium 1006 , an image generating IC 1010 and input/output ports 1020 - 1 , 1020 - 2 , all of which are interconnected for data receiving/transmitting through a system bus 1016 .
- the system is connected to various instruments such as PC, colored light sensor 60 and so on through the input/output ports 1020 - 1 , 1020 - 2 .
- the information storage medium 1006 is to store a program, image data and so on.
- the program stored in the information storage medium 1006 as well as a program stored in the ROM 1002 are used to cause the CPU 1000 to perform the control of the whole system and various data processings.
- the RAM 1004 is storage means used as a working area for the CPU 1000 and the like and to store given contents of the information storage medium 1006 and ROM 1002 and the computation results of the CPU 1000 . Data structure having a logical configuration for implementing this embodiment will be build on the RAM 1004 or information storage medium 1006 .
- FIGS. 1 to 15 Various processings described in connection with FIGS. 1 to 15 are realized by the information storage medium 1006 stored a program for performing these processings, the CPU 1000 operated according to the program, the image generating IC 1010 and others.
- the processings carried out in the image generating IC 1010 and the like may be attained through any hardware circuit or the like or may be accomplished in software through the CPU 1000 or any general-purpose DSP or the like.
- the information storage medium 1006 may be any of various forms such as CD-ROM, DVD-ROM, ROM, RAM and so on.
- the information storage medium 1006 may be either of contact type or non-contact type.
- the aforementioned functions may be realized by downloading a program for realizing the functions or the like from a host device or the like through a transmission path.
- the information for realizing the aforementioned functions may be embodied in carrier wave.
- FIG. 10 shows the technique of determining the coordinate values of complementary color pair using the inverse vector
- any other technique not using the inverse vector may be used in the present invention.
- a technique of determining the coordinate values of complementary color pair using the exterior division point may be used in the present invention.
- FIG. 12 is a schematic diagram showing the concept of exterior division point in the Lab space.
- the technique of external division point determines P 1 (a 3 , b 3 ) through the following formulas (7) and (8).
- the coordinate values of complementary color pair can be determined using the external division point.
- the present invention is not limited to such a one-to-one connection type network meeting system, but may be applied to any of various other image display systems. A case where the present invention is applied to a network meeting system which is one of the network type image display systems will be described.
- FIG. 14 schematically illustrates a bus connection type network meeting to which the present invention is applied while FIG. 15 schematically illustrates an interconnection type network meeting to which the present invention is applied.
- the bus connection type network meeting form may include a meeting room A 600 as a reference location and other meeting rooms B 610 , C 620 . . . n 690 in each of which the image must be regulated for the environment thereof different from that of the reference environment.
- the network meeting form always transmits the original image data and the visual environment information from the projector 20 of the meeting room A 600 to the respective projectors 20 of the meeting rooms B 610 , C 620 . . . n 690 .
- the projector 20 of the meeting room A 600 is provided with transmitter means for transmitting the original image data and the visual environment information in place of the aforementioned receiving/transmitting section 210 .
- Each of the projectors 20 of the other meeting rooms B 610 , C 620 . . . n 690 is provided with receiver means for receiving the original image data and the visual environment information.
- any of the meeting rooms may have a reference environment.
- the above embodiments are described as to the transmission of the reference environment information from a predetermined image display device to the individual image display devices at other different locations, the information may be transmitted from each of the individual image display devices at the different locations toward the image display device at the reference environment location.
- the image color in any of the individual image display devices may not be sufficiently regulated even though the reference environment information is transmitted from a predetermined image display device to each of the individual locations.
- the image display device at each of the different locations may transmit the visual environment information thereof to the image display device at the reference environment location.
- the image display device at the reference environment location may regulate the reference environment information so that each of the image display devices at the individual different locations can easily regulate the image color.
- the regulated reference environment information may then be transmitted to the other image display devices at the other different locations.
- the display of image color in all the image display devices can surely be integrated even though various image display devices are interconnected together.
- the present invention may be applied to any display means for displaying the presentation image other than the aforementioned projector means.
- display means may include a projector using a digital micromirror device (DMD), a display device such as a cathode ray tube (CRT), a plasma display panel (PDP), a field emission display (FED), an electroluminescence (EL) display, or a direct view type liquid crystal display device.
- DMD digital micromirror device
- CTR cathode ray tube
- PDP plasma display panel
- FED field emission display
- EL electroluminescence
- the present invention may be applied to an image display system wherein different display means may be used, that is, a projector on the transmitter side and a large-sized monitor on the receiver side.
- the present invention may be applied to an image display system wherein any image display means such as a projector for inputting/outputting digital image signals.
- the function of the aforementioned projector image processing section 100 may be realized by a single image display device (e.g., a projector 20 ), but may be realized by a plurality of processors in a distributed fashion (e.g., through a distributed processing through projectors 20 and PCs).
- the visual environment grasping means is not limited to the colored light sensor 60 , but may be any of various other forms.
- the visual environment grasping means may include one or combination of various other devices such as a colorimeter for reading the XYZ values or Lab values in the image display area, a meter for measuring the gamma value in the image display area, a meter for measuring the color temperature in the image display area, a color temperature measuring device such as a color temperature meter for measuring the color in the image display area, a sensor for measuring the ambient light and so on.
- the visual environment to be grasped by the visual environment grasping means may include the ambient light (illumination light, natural light or the like), an object on which the image is to be displayed (e.g, display. wall, screen and the like) and so on.
- the screen 10 has been described as to the reflection type, it may be of transmission type. If the screen is of transmission type, it is preferred that the colored light sensor is a sensor for directly scanning the screen.
- the data received/transmitted using the receiving/transmitting section 210 is not limited to the XYZ values.
- the transmitter side device may send data indicating the gamma and color temperature in the reference environment to the receiver side device which in turn corrects the input/output profiles based on the received data indicating the gamma and color temperature as well as data indicating the gamma and color temperature in the receiver side environment.
- Such a technique can similarly reproduce substantially the same color simultaneously at different locations.
- the present invention may use a backward projection type projector.
- the aforementioned transmission path is not limited to the wire line such as the dedicated line 540 , but may be a wireless line such as a satellite communication path.
Abstract
Description
R signal (bit)=KR×input signal before correction (1)
G signal (bit)=KG×input signal before correction (2)
B signal (bit)=KB×input signal before correction (3)
KR=maximum R input value after correction/255 (4)
KG=maximum G input value after correction/255 (5)
KB=maximum B input value after correction/255 (6)
a3=(−s×a1+2s×a2)/(2s−s)=−a1+2×a2 (7)
b3=(−s×b1+2s×b2)/(2s−s)=−b1+2×b2 (8)
Claims (4)
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JP2000154074A JP3791586B2 (en) | 2000-05-25 | 2000-05-25 | Image display system, image processing method, and information storage medium |
JP2000-154074 | 2000-05-25 | ||
PCT/JP2001/004254 WO2001091099A1 (en) | 2000-05-25 | 2001-05-22 | Image displaying system of environment-adaptive type, image processing method and program |
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US20030007098A1 US20030007098A1 (en) | 2003-01-09 |
US7061547B2 true US7061547B2 (en) | 2006-06-13 |
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US10/031,441 Expired - Fee Related US7061547B2 (en) | 2000-05-25 | 2001-05-22 | Image displaying system of environment-adaptive type, image processing method and program |
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US (1) | US7061547B2 (en) |
JP (1) | JP3791586B2 (en) |
CN (1) | CN1180396C (en) |
WO (1) | WO2001091099A1 (en) |
Cited By (5)
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US20070110304A1 (en) * | 2003-12-10 | 2007-05-17 | Masato Tsukada | Projector color correcting method |
US20090244085A1 (en) * | 2006-01-19 | 2009-10-01 | Masayuki Nakazawa | Image Display Apparatus, Image Display Method And Image Display Program |
US20100007798A1 (en) * | 2008-07-14 | 2010-01-14 | Sony Computer Entertainment Inc. | Image projection device, control method therefor, and information storage medium |
US20110181685A1 (en) * | 2010-01-26 | 2011-07-28 | Polycom, Inc. | Method and Apparatus to Virtualize People with 3D Effect into a Remote Room on a Telepresence Call for True in Person Experience |
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Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0998301A (en) | 1995-10-02 | 1997-04-08 | Canon Inc | Image processor and its method |
JPH09107484A (en) | 1995-10-12 | 1997-04-22 | Ricoh Co Ltd | Color correction device and method and device for color management |
JPH1065930A (en) | 1996-08-19 | 1998-03-06 | Fuji Xerox Co Ltd | Color image processing method and color image processing unit |
JPH10105145A (en) | 1996-10-01 | 1998-04-24 | Canon Inc | Picture processing device |
JPH10224646A (en) | 1997-01-31 | 1998-08-21 | Canon Inc | Picture processor and picture processing method |
JPH10304395A (en) | 1997-03-08 | 1998-11-13 | Lg Electron Inc | Device for judging surrounding illumination light and video correction controller using the judgment |
JPH1132228A (en) | 1997-02-21 | 1999-02-02 | Sony Corp | Device and method for transmission, device and method for reception, system and method for processing picture, device and method for processing image data, and medium for providing image data |
JPH1175072A (en) | 1997-08-29 | 1999-03-16 | Toyota Motor Corp | Image output method and system |
JPH1185952A (en) | 1997-09-09 | 1999-03-30 | Olympus Optical Co Ltd | Color reproducing device |
JPH11175048A (en) | 1997-12-15 | 1999-07-02 | Fuji Xerox Co Ltd | Color image conversion coefficient calculation method and color image conversion method |
JPH11276441A (en) | 1998-03-26 | 1999-10-12 | Fuji Photo Film Co Ltd | Medical image display system |
US6628822B1 (en) * | 1997-02-21 | 2003-09-30 | Sony Corporation | Transmission apparatus, transmitting method, reception apparatus, reception method, picture processing system, picture processing method, picture data processing apparatus, picture data processing method and furnished medium |
US6912306B1 (en) * | 1998-12-07 | 2005-06-28 | Sony Corporation | Image-processing apparatus and image-processing method |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3707350B2 (en) * | 2000-05-08 | 2005-10-19 | セイコーエプソン株式会社 | Image display system, projector, image processing method, and information storage medium |
-
2000
- 2000-05-25 JP JP2000154074A patent/JP3791586B2/en not_active Expired - Fee Related
-
2001
- 2001-05-22 US US10/031,441 patent/US7061547B2/en not_active Expired - Fee Related
- 2001-05-22 WO PCT/JP2001/004254 patent/WO2001091099A1/en active Application Filing
- 2001-05-22 CN CNB018014259A patent/CN1180396C/en not_active Expired - Fee Related
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0998301A (en) | 1995-10-02 | 1997-04-08 | Canon Inc | Image processor and its method |
JPH09107484A (en) | 1995-10-12 | 1997-04-22 | Ricoh Co Ltd | Color correction device and method and device for color management |
JPH1065930A (en) | 1996-08-19 | 1998-03-06 | Fuji Xerox Co Ltd | Color image processing method and color image processing unit |
JPH10105145A (en) | 1996-10-01 | 1998-04-24 | Canon Inc | Picture processing device |
JPH10224646A (en) | 1997-01-31 | 1998-08-21 | Canon Inc | Picture processor and picture processing method |
JPH1132228A (en) | 1997-02-21 | 1999-02-02 | Sony Corp | Device and method for transmission, device and method for reception, system and method for processing picture, device and method for processing image data, and medium for providing image data |
US6628822B1 (en) * | 1997-02-21 | 2003-09-30 | Sony Corporation | Transmission apparatus, transmitting method, reception apparatus, reception method, picture processing system, picture processing method, picture data processing apparatus, picture data processing method and furnished medium |
JPH10304395A (en) | 1997-03-08 | 1998-11-13 | Lg Electron Inc | Device for judging surrounding illumination light and video correction controller using the judgment |
JPH1175072A (en) | 1997-08-29 | 1999-03-16 | Toyota Motor Corp | Image output method and system |
JPH1185952A (en) | 1997-09-09 | 1999-03-30 | Olympus Optical Co Ltd | Color reproducing device |
JPH11175048A (en) | 1997-12-15 | 1999-07-02 | Fuji Xerox Co Ltd | Color image conversion coefficient calculation method and color image conversion method |
JPH11276441A (en) | 1998-03-26 | 1999-10-12 | Fuji Photo Film Co Ltd | Medical image display system |
US6912306B1 (en) * | 1998-12-07 | 2005-06-28 | Sony Corporation | Image-processing apparatus and image-processing method |
Non-Patent Citations (1)
Title |
---|
U.S. Appl. No. 10/019,698, filed Jan. 2, 2002, Wada. |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030214510A1 (en) * | 2002-05-17 | 2003-11-20 | Nec Corporation | Projection plane color correction method of projector, projection plane color correction system of projector and program for projection plane color correction of projector |
US7339596B2 (en) * | 2002-05-17 | 2008-03-04 | Nec Corporation | Projection plane color correction method of projector, projection plane color correction system of projector and program for projection plane color correction of projector |
US20070110304A1 (en) * | 2003-12-10 | 2007-05-17 | Masato Tsukada | Projector color correcting method |
US7822269B2 (en) * | 2003-12-10 | 2010-10-26 | Nec Corporation | Projector color correcting method |
US20090244085A1 (en) * | 2006-01-19 | 2009-10-01 | Masayuki Nakazawa | Image Display Apparatus, Image Display Method And Image Display Program |
US20100007798A1 (en) * | 2008-07-14 | 2010-01-14 | Sony Computer Entertainment Inc. | Image projection device, control method therefor, and information storage medium |
US8469518B2 (en) * | 2008-07-14 | 2013-06-25 | Sony Corporation | Image projection device, control method therefor, and information storage medium |
US20110181685A1 (en) * | 2010-01-26 | 2011-07-28 | Polycom, Inc. | Method and Apparatus to Virtualize People with 3D Effect into a Remote Room on a Telepresence Call for True in Person Experience |
US8487977B2 (en) * | 2010-01-26 | 2013-07-16 | Polycom, Inc. | Method and apparatus to virtualize people with 3D effect into a remote room on a telepresence call for true in person experience |
Also Published As
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CN1180396C (en) | 2004-12-15 |
JP2001337665A (en) | 2001-12-07 |
WO2001091099A1 (en) | 2001-11-29 |
JP3791586B2 (en) | 2006-06-28 |
CN1381037A (en) | 2002-11-20 |
US20030007098A1 (en) | 2003-01-09 |
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